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| 不同折射率气体包层环境对微光纤传输光强的影响 |
| The impacts of different refractive-index gas claddings on the light intensity in micro-fiber |
| 投稿时间：2015-03-17 |
| DOI：10.3969/j.issn.1005-5630.2015.03.009 |
| 中文关键词: 折射率 微纳光纤 气体传感 倏逝场 |
| 英文关键词:refractive index micro-fiber gas sensing evanescent field |
| 基金项目: |
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| 中文摘要: |
| 基于微纳光纤倏逝场传感理论,通过调制微光纤包层空气的折射率,来探究不同气体折射率环境对微光纤输出光强的影响,从而为制作高灵敏度的特殊气体传感器提供实验指导。实验选择了折射率为1.359 0的丙酮液体和1.494 6二甲苯液体,实验测得相同体积的二甲苯和丙酮在挥发完全后对微光纤束缚光的能力改变不一样,二甲苯使纤芯传输的能量明显减弱,倏逝场能量增强。 |
| 英文摘要: |
| Based on the evanescent field sensing theory of micro-nano fiber, we research how the output light intensity changes in the micro-fiber with different refractive-index gas modulated claddings, which provides experimental guidance to produce special high-sensitivity gas sensors. We utilize the vapors of acetone (refractive index is 1.359 0) and xylene (refractive index is 1.494 6) liquid with the same volume to modulate the cladding-air refractive index respectively. The results show the micro-nano fiber has different light binding abilities for different gas-modulated cladding. In the case of xylene gas, the energy in the core is weakened significantly and the evanescent field energy becomes strong. |
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